Adjustable wrench



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J. v. LAREBQN ADJUSTABLE WRENCH @riggimi, Filed August 12, 1922 V w/ v im M J w Patented Oct. 12, 1926. 'f 1,602,619

UNITED STATES PATENT OFFICE;

JOHN V. LARSON, OF CHICAGO, ILLINOIS.

ADJUSTABLE WRENCH.

Application filed August 12, 1922, Serial No. 581,344. Renewed March 16, 1926.

This invention relates to that type. of adbearing surface 4 at its rear end as shown justable wrenches in which the movable aw and for the purpose hereinafter stated. member and its operating sleeve nut are con- The formation of the guide housing 1 of nected to the companion stationary jaw plate metal is in itself old and in general use,

5 member by an intermediate rocker yoke. and no claim per se is made thereto other pivotally mounted on the stationary jaw than the detail formations and features member, to permit of limited independent thereof and by which coaction is attained movement between the aw members in at- With the associated parts of the mechanism.

taining the proper initial holding grip upon 5 designates the operating handle or lever 10 the article operated on, and the present nnfixedly secured at its forward end between provement has for its various ob ects the lower portions of the side. walls or plates To provide a structural. formation of the of the housing 1, by rivets or other fastening rocker yoke adapting the same for effective means, and formed at its forward and upper engagement with the operating sleeve nut corner with an upturned hook shape abut- 15 and with the stationary jaw member, in an ment lug 6, acting as'a part of the pivot rest economical and durable manner, and with for the rocker yoke hereinafter described. which accidental turning of the operating In the construction shown, the handle or sleeve nut, by contact with exterior surfaces lever 5, is provided with side lugs 7 constior objects is prevented. tuting bearing abutments for the rear ends To provide a simple, economical and du- 0f the housing 1, to aid in strengthening the rable formation of the guide housing, by connection of the parts. which the parts are enclosed and guided 8 designates the stationary jaw of the after assembly and in actual use, all as will wrench secured between the forward and hereinafter more fully appear. lower ends of the side walls or plates of 25 In the accompanying drawing: the housing 1 by a rearwardly extending Fig. 1 is a side elevation of an adjustable rib or fin abutting against the forward end pipe wrench, embodying the present imof the handle 5, as shown in Fig. 1.

provements; 9 designates the forwardly arranged adso Fig. 2 is a transverse section on line 2-2, justable jaw of the wrench, formed with a so Fi 1; rearwardly extending screw threaded shank Fig. 3 is a detail longitudinal section on 10, in angular relation to said jaw portion, line 33, Fig. 2; and having the usual rectangular or other Fig. 4 is a detached perspective view of noncircular form in cross-section adapting the plate metal guide housing; the same for sliding movement between the 35 5 is a similar view of the rocker yoke side walls or plates of the housing 1 and in member; and a plane above the lever or handle 5 afore- Fig. 6 is a view of the plate metal blank said.

or stamping from which the yoke member 11 designates an adjusting sleeve nut is shaped. formed for manual rotation and arranged 4 Like reference numerals indicate like parts within the aforesaid openings 2 of the side in the several views. walls of the housing 1, with its screw-thread- In the drawings, 1 designates a guide ed bore in operative engagement with the housing formed of plate metal and having screw-threads of the shank 10 aforesaid.

a fiat U-shape in cross-section with the side 12 designates a rocker yoke, which in the 45 walls or plates in spaced parallel relation, present improvement is formed from a plate united together at top by a cross web as metal blank of the required form and so shown. bent and shaped as to provide a main por- 2 designates openings formed in the side tion 13 of a disk shape having a central walls or plates of the housing in transversely orifice adapted to fit over the movable aw alined relation, and each formed with a shank 10, and a forwardly extending guide rounded bearing recess or socket 3 at its tongue is, adapted for guiding movement lower and forward corner, and with, a curved between the side wall of h iusins, i.-

to provide a forwardly extending pivot prong 15 at the lower and forward corner of the rocker yoke, and produced by a return bendiof the metal of the blank, said pivot prong 15 being adapted for pivotal bearing in the bearing recesses 3, of the housing 1 and in the abutment recess of the lug 6, of the handle 5. Also to provide. a rearward extension 16 in right-angle relation to the main disk portion 13, with said extension 16, having at its rear end an angular lug 17 arranged in the path of the sleeve nut 11 aforesaid, to limit independent rearwardmovement of the sleeve nut with relation to i the rocker yoke, and in addition to have sliding. engagement against the curved bearing surfaces 4, of the housing 1, above described, to prevent independent rearward movement of rocker yoke with relation to thehousing 1.

In the present construction, the orificed disk portion 13, aforesaid, is, arranged in front of the operating sleeve nut 11, and is adapted to limit independent forward movement of said sleeve nut with relation to the rocker yoke 12. In the preferred construction shown, said orificed disk portion 13, has a diameter greater than the sleeve nut 11 for the purpose of guarding said nut from contact with exterior objects and prevent accidental turning of the nutthereby.

18 designates spring interposed between the rocker yoke 12, and the handle orlever 5, and adapted to yieldingly swing the yoke 12, sleeve nut 11, and the shank 10, of the movable wrench jaw 9, in a direction away from the handle 5, and normally hold the movable wrench jaw 9, in a position nearer the fixed wrench jaw 8, in order to require a pressure of the thumb of the operator upon the rear portion of the shank, 10, to attain an initial and limited opening of the jaws in applying the wrench tov a pipe or the like. Said spring feature and its function is common in the present type of adjustable pipe wrenches.

Having fully described my invention which I claim as new anddesire to secure by Letters Patent, is

1. In an adjustable wrench of the type described, the combination of a fixed, jaw member having an operating handle, a plate metal housing of a flat U-shape fixedly secured to the forward end of said handle with its parallel side walls formed with transversely alined openings which in turn are formed with pivot recesses at their lower front corners and with curved bearing surfaces at their rear ends, a movable jaw member having a screw-threaded shank sliding in said housing, a sleeve nut arranged in said openings and having operative engagement with said shank, and a rocker yoke of anenguiar form pivoted in the aforesaid pivot recesses of the housing and having sliding engagement at its rear end with the curved surfaces in the openings of the housing, said rocker yoke having bearing engagement with said sleeve nut.

2. In an adjustable wrench ofthe type described, the combination of a fixed jaw formed of plate. metal and comprising an or ficed disk portion encircl ng the shank aforesaid andprovided at its lowerend with a forwardly extending pivot lug fitting the pivot recesses of the housing and near its upper end with a forwardly extending guide tongue adapted-for sliding movement between the side walls of the housing, said k p r havi g b ar n ga ement with the sleeve nut.

3 In an adjustable wrench of the type described, the combinationof a fixed jaw member having an operating handle, a plate metal housing of a fiat U-shapefiXedly. se-

cured to the forward end of said liandle I with its parallelside walls formed with transversely alined openings which in turn are formed with pivot recesses at their lower and front corners and with curved bearing surfaces at their rearends, a movable jaw member having. a screw-threaded shank sliding in said housing, a sleeve nut arranged in said openings and having operativeengagement with said shank, and a rocker yoke formed of plate metal and comprising an orificed disk portion encircling. the shank aforesaid and a lower rearward extension adapted for sliding engagement with rear curved surfaces of the openings of the housing, said rocker yoke having at its lower forward corner a forwardly extending pivot lug fitting the pivot recesses of the; housin and formed by a rebend of the metal, sai disk portion having bearing engagement with said sleeve nut. V

4. In an adjustable wrench of the type described, the combination fined jaw member having an operating handle, a plate metal housing of a flat U-shape fiiredly secured to the forward end ofsaidfhandle with its parallel side walls formed transversely alined openingswhich in turn are formed with pivot recesses at their lower frontcorners and with curved bearing surfaces at their rear ends, a movable jaw member having a screw-threaded shank mg 1n said housing, a sleeve nut arranged in said openings and having operative engagement with said shank, and a rocker yoke formed of plate metal and comprising an orificed disk portion encircling the shank aforesaid and a lower rearward extension having an upturned flange at its rear end adapted for sliding engagement with rear curved surfaces of the openings of the housing, said rocker yoke having at its lower forward corner a forwardly extending pivot 10 lug fitting the pivot recesses of the housing, said disk portion having bearing engagement with said sleeve nut.

Signed at Chicago, Illinois; this 7th day of August, 1922.

JOHN V. LARSON. 

